codes 1516 1518 2108

[fredhouse]

This morning i started my car and let run about 1/2 hour before getting in and when i did the check light was on and reduced power was showing. I shut off truck for 5 min and the reduced power went away. Its showing codes 1516 1518 and 2180.Could i be getting these codes because the Throttle Body is dirty.Thank you for all your help.


2003 chevy suburban z71

v8 5.3l

123000 miles

 

[triz]

It wouldn't hurt to clean it. Check the harness and make sure it's intact.

 

[fredhouse]

update to problem i cleaned the Throttle Body it ran amazing and it still does but the codes returned today 1518 1516 and 2108,i checked the harness at the throttle body and looks good,also checked the ground under drivers seat cleaned and put back.If light comes back on again looks like i will replace the Throttle Body.If anyone know anything else i should check let me know please this part is not cheap,Thank you for all your help i get here.

2003 chevy suburban z71

v8 5.3l

123985 miles

 

[MAY03LT]

I'm hesitant to post this since it is dangerous so use this at your own risk -

Get someone to hold rpms to 2000 and wiggle tbody wires 1-4 inches from the tbody. Do them one at a time. The wires may look good but can be broken behind the insulation.

If that doesn't show anything -

There are two grounds that the tbody uses. There is a ground behind the left cylinder head (G104) and one to the right of the brake booster (G107). The one behind the head is tough to get at but is doable. Make sure they aren't broken.

Any other testing will require some electrical testing tools.

Although it's not uncommon for a tbody to crap out on these trucks (tahoe/silvy/suburban) it is worth the time diagnosing it properly so you don't get hosed with a tbody that you don't need.

 

[IllogicTC]

I'd go at it from the side when doing the "wiggle test," reduce the likelihood of injury from hanging over the fan.